Khalid Musa, A., A. obaid Abdulla Zeab, and D. Mostefa Sleman. “Distinction Between Two Main Schools (Formalism and Prague Circle) Code: Formalism, School, Scientists, Language, Literature”. Academic Journal of Nawroz University, vol. 11, no. 3, Aug. 2022, pp. 523-40, doi:10.25007/ajnu.v11n3a1406.